Insulator



0. L. ROBERTS.

INSULATOR APPLICATION mu) JULY 21. me. RENEWED MAR. 7. m9.

1,305, 168, Patented May 27, 1919.

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INSULA'I'OB.

Specification of Letters Patent.

Patented May 27, 1919.

Application filed July 21, 1918, Serial No. 110,589. lienewed March 7, 1919. Serlal No. 281,293.

To all whom. it may concern:

Be it known that I, Oman L. ROBERTS, a citizen of the United States, residing in Macy, county of Miami, State of Indiana,

have invented certain new and usefullmprovements in Insulators, of which the folowing is a specification.

My invention relates toimprovements 1n electric insulating devices and more articu- '10 larly to devices of this character w ich are utilized to support telegraph, telephone, electric light and other electric current conducting wires from posts .or other suitable supports. I

16 Hcretofore wires .used for this purpose have generally been supported from top caps ofglass or similar non-conducting material,

attaching the wires to the caps by separate binding wires or by 'windm the wires 20 around the ca This-constructlon while appalcntly,thpimst-devised for this purpose prior m nty/present improvement has some disadvantagesin that the binding wires may divertfthe electric current and m some in- -stanoes'cause' short circuiting-, .the wiring is somewhet-difiicultand slow, to put up and requires the services of skilled electricians and when erected under certain conditions is apt to allow excessive vibration, creating 80lbuzzingor ringing sounds that in the case of telegraph and hole hone wires would materiallyiinterfere wit the clcnrness of the sending and receiving.

Theobjects of my invention are to secure 85 perfect-insulation under all conditions, to eliminate the use of separate binding wires, to avoid bending or curving the conducting wires about the insulators, to so construct the insuletin devices that the conducting .wires 40 ma be p seed in position upon a post or detac ed therefrom very rapidly and effectivel without the aid of pliers or other tools and y ordinary workmen, to prevent the collection of moisture upon or near the conducting wires apt to cause short circuiting,

to support the conducting wires in an approximately straight line and to render the voice or other sounds carried over the wires, plainer, more distinct and louder.

These and. other advantages I accomplish by my improved device as hereinafter set forth in the following description and as more particularly pointed out in the appended clainis, reference being bad to the accompanying drawings in which an embodiment or adaptation of my invention is shown.

In the drawings Figure 1 represents a side elevation of one embodiment of my improved insulating 60 device.

Fig. 2 is a central longitudinal section through the embodiment of my im roved insulating device shown in Fig.'1, talien on line 2-2 in said Fi 1, the arm or branch 66 upon which the insu ation proper is mounted being shown in side elevation.

Fig. 3 is an enlarged section through the insulator base taken on line 33 Fig. 4.

Fig. 4 is an enlarged, detached top or plan 70 view of the insulator base, showing the groove in which the electric conducting wire is supported.

In referringto the embodiment or adaptation of my improved insulating device shown in the accompan ing drawings in detail, like numerals in icete corresponding parts.

The embodiment or adaptation of my improved insulating device as illiistrated is princi ally adapted to be attnched'to or en porte from apole or similar suitable artic e.

. It comprises, in brief, a suitable supporting arm or branch, 21 base which'preferably is of a ring-like form and a top cap.

The arm or branch, 1, is preferably constructed of wood or other suitable material and has its upper portion reduced in size and to a circular form, being screw-threaded as shown at 2, in Fig. 2. This arm is provided with apertures 3, through which screws or other fasteners may be inserted to secure the arm to a post or other suitable su ort.

e base, 4, is fitted upon the upper portion of the arm or branch 1, being slip ed over the same and around a tapering medial portion, 5, of said arm as shown in Fi 2.

his base is constructed of glass, porce ain, earthenware or other suitable insuhtting material and it is provided on its top surface with a straight groove, 6, of sufiicient depth to receive an electric conducting wire, 7, as shown in Fig. 2. Thisv roove it will be notedfrom Fig. 4 exten s on one side of the central opening, 8, through the base. The base is also rovided on its inner, annular wall surroun 'ng the central opening, 8, with a series of, longitudinal. grooves, 9, which constitute passage ways for water or 110 moisture. These transverse grooves, 9, as shown in Fig. 3 gradually derpen and widen from the top of the base downward to the bottom surface thereof, thus permitting the water or moisture that collects upon the top surface of the base or within its center opening to freely flow downward and out of the same. Preferably the top groove in the base is made deep and wide enough to form a snug fit for the conducting wire placed therein.

The conducting wire is locked or secured in the top groove, 6, by a screw cap, 1

which is referably formed as shown in Figs. 1 2 being provided with an internal screw-thread into which the screwthreaded upper portion, 2, of the arm, 1, engages, an exterior groove, 11, which extends horizontally and circumferentiallv irlpund an intermediate portion thereo e a co acting wire to the support in the old and \yell'known way if desired.

In putting up wires with my improved insulating device, the arm or branch, 1, is suitably attached to a pole or other support, the base is slipped over the upper end 0 the arm and upon the medial portion of the same, the conducting wire is fitted in the top groove, 6, bein flush with a top surface of the base and tie top cap is screwed down upon the base, thereby rmly holding and locking the conducting wire in the groove. The top cap like the base can be constructed of glass, porcelain, earthenware or any other suitable lIlSUlatlIl material.

The principal advantages of my improved insulating device are that the insulation and the conducting wires can be assembled or dismounted much more quickly and more effectively than by the mascot devices now universally in use, that t e conducting wires are supported in a tight condition, are perfectly insulated, are not liable to short circuiting' and do not require separate binding wires. Other advantages are that the wires can be put up much more re idly and by ordinary workmen, thus ren ering it decidedly cheaper to use my improved device.

oove, 11, may be employed to secure M improved device also practically eliminates vibration and buzzing sounds and makes the sounds and voices carried over the wires more audible, 'plainer, louder, clearer and much more distinct.

While I have herein described a certain embodiment or adaptation of .my improved insulatingedevioe it isto be understood that it may varied or changed within the scope of the following claims without dev parting from the spirit of my invention.

Having thus described my invention, what I claimto be new and patentable is:

1. In an insulating device for supporting electric conducting wires, a suitable supporting arm having a screw-threaded upper portion and a tapering medial rtion, a ring like base of insulating material slipped over the screw-threaded portion and fitted upon the tapering medial: portion said base having a top groove ada ted to receive and support an e ectric con ucting wire, and a series of interior grooves forming passage ways for the flow of moisture, and a top cap of insulating material adapted to screw upon the serew-threaded upper portion of thearm and against the base to fasten the conducting wire in the groove.

2. In an. insulatin device for supporting electric-conducting wires, a suitable supporting arm having a serewthreaded upper por' tion and a tapering medial portion, a ring like base of insulating material slipped over the screw-threaded portion and fitted upon the tapering medial portion said base having a horizontal top groove adapted to receive and support an electric conducting wire, and a series of vertically extending interior rooves forming passage ways for the flow o moisture, and a top cap of insulating material adapted to screw upon the screw-threaded upper portion of the arm and against the base to fasten the conducting wire in the groove.

OMER L. ROBERTS.

Witnesses:

VILLA DAY, Essm G. DAY. 

